Good practices for reporting the photocatalytic evaluation of a visible-light active semiconductor: Bi2O3, a case study

Hernandez-Gordillo Agileo; Bizarro Monserrat; Gadhi Tanveer A.Martinez AnaTagliaferro AlbertoRodil Sandra E.

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Good practices for reporting the photocatalytic evaluation of a visible-light active semiconductor: Bi2O3, a case study

机译：良好的实践报告光催化可见光活性的评价半导体:Bi2O3,一个案例研究

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In this paper, we discuss the importance of distinguishing the contributions of photolysis, adsorption, sensitization, degradation and mineralization processes to the photocatalytic activity of a visible-light active semiconductor: Bi2O3. Based on this case study, we propose a follow-up work plan to obtain the relevant information and achieve proper interpretation of reported data to adequately infer the photocatalytic activity of the Bi2O3 material. To do so, we compared the changes in the theoretical and experimental absorbance spectra of three different dyes during the photodegradation process: rhodamine-B (RhB), acid blue 113 (AB) and indigo carmine (IC). Photocatalytic degradation of these dyes using the same semiconductor material (Bi2O3) was performed using the standard spectrocolorimetric method while taking care to appropriately consider the competing processes mentioned above. Furthermore, the degree of mineralization achieved due to the photocatalytic degradation of the dyes was obtained using the total organic carbon (TOC) analysis. The commonly used evaluation of the results suggests that a certain degree of photodegradation and mineralization was achieved. However, careful analysis indicates that this was mainly due to a decrease in the relative concentration of the dye molecules in the solution because of their adsorption on the surface of the semiconductor and not to complete degradation.

机译：在本文中,我们讨论的重要性区分光解的贡献,吸附、敏化、退化和光催化矿化过程活动可见光活性的半导体:Bi2O3。获得相关的后续工作计划信息和实现适当的解释报告数据充分推断的光催化活性的Bi2O3材料。这样做,我们比较理论的变化和实验吸光度光谱三种不同的染料在光降解过程:罗丹明b (RhB),酸性蓝113 (AB)和靛胭脂(IC)。这些染料使用相同的降解半导体材料(Bi2O3)执行使用标准的spectrocolorimetric方法而照顾适当考虑上面提到的竞争过程。由于矿化实现的程度光催化降解染料的获得使用总有机碳(TOC)分析。结果表明,一定程度的光降解和矿化。然而,仔细分析表明这是主要是由于相对减少染料分子的浓度解决方案,因为他们的吸附半导体表面,而不是完整的退化。

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来源
《Catalysis science & technology》 |2019年第6期|1476-1496|共21页
作者
Hernandez-Gordillo Agileo; Bizarro Monserrat; Gadhi Tanveer A.Martinez AnaTagliaferro AlbertoRodil Sandra E.;
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Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuit Exterior SN,Ciudad Univ, Cd De Mexico 04510, Mexico;

Politecn Torino, Dept Appl Sci & Technol, Turin, Italy;

Univ Engn & Technol, USPCASW, Jamshoro 76062, Pakistan;

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正文语种英语
中图分类汉语教学;
关键词
Levanol Fast Cyanine 5RN; Dyes; MineralizationCase studiesmineralization rateDye concentrationsSemiconductor materialsdyeingphotolysis;

机译：Levanol快速青蓝5 rn;染料;MineralizationCasestudiesmineralization rateDyeconcentrationsSemiconductormaterialsdyeingphotolysis;

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Good practices for reporting the photocatalytic evaluation of a visible-light active semiconductor: Bi2O3, a case study

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